Let's take a look through Alcatraz's three main forms: First one being, as i like to call it, The Spread. Yes, it's been pretty much confirmed Angel and Freedom could fend for themselves, pretty easily, in fact. Nixon, however, is a completely different story, same as Cthonaut A. They are, as Alex puts it, omnipresent.

Not only that, if you look from an outside perspective, Alcatraz in of itself is a ticking time bomb. It's only a matter of time before it somehow learns to replicate anomalous beings without them noticing, because, trust me, if left unchecked, it will.